Overnight MS released VS update for 15.8.5 which resolved all the problems. I apparently missed the little tidbit about VS updates "rolling out soon". Lesson learned to make sure everything is all ready before doing any updates.

Has there been any recorded bugs for projects that previously targeted iOS 11?

I have been working on a project for some months now and it was nearly ready for release. I then updated everything (iPad, VS for mac and xCode) for iOS 12 and it is taking 2 minutes for my app to boot up? Is it just me or has anyone else had some bugs?